Air-pump.



G. E. HAZARD.

AIR PUMP.

I APPLICATION FILED APR. 8, |9l8- i-,291,504=, Patented Ja11.14,1919.

. 2 SHEETS-SHEET l- G. E. HAZARD.

AIR PUMP.

APPLICAIION FILED APR.8i 1918.

, 1,291,504, Patented Jan. 14, 1919.

2 s'HEETs-sHEET 2.

. ATE

OFFICE.

EDGAR HAZARD. OF ROCHESTER, NEW YORK. ASSIGNOR TO KELLOGG MANU-FACTURING 00., OF ROCHESTER, NEW YORK.

AIR-PUMP.

Application filed April 8, 1918.

El? all who/11. it may unicorn Be it known that I. GEORGE F. Hamlin, aci'izen of the l nited States. residing at iilochester. in the county ofMonroe and State of New York. have invented certain new and usefullmproven'ients in Air- Tnmps, of which the following is a specificationreference being had therein to the accon'ipanying drawing.

'il 'liisi invention relates to improvements in air pumps. and isparticularly intended for two classes of service :(o) for use in sup-Plj/lllg' air to large sized pneumatic tires on motor trncks. and (b)for garage use in supplying heavy air pressure to storage tanks forinflating automobile tires.

The invention is also adapted to be used wherever a small high duty aircompressor is desired, and it may also used for supplying air to anair-whistle on motor boats, and tor supplying air pressure to air motorstarting devices.

ii'here air pumps are used for inflating tires. it is necessary toprevent oil passing to the tires with the compressed air to avoid injuryto the tires. and the primary object of my invention is to provide animproved oiling system so constructed and arranged that all of themovable parts of the pump are eiiicicntly lubricated while at the samelimo compri sod air is delivered free trout any trace of oil.

Anotherobject of the present invention is to construct the cylinder headwith a charm ber directly at the outlet side of the outlet valve topermit a free escape of the compressed air around and after it passesthe valve.

i Another object of the invention is to provide an improved spiral formof valve sprin whereby a very sensitive spring is provided; so that itcan be compressed without the coils interfering with the action of thespring. and whereby a larger gage of spring wire can be used than with astraight iring; the larger wire .is not so much a l i by the heat of thepump as a smaller wire in a straight spring would be.

Another object ofmy present invention "o provide an improved manner ofconnecting the outlet manifold air-tight to the heads of the cylinders.

in the accompanying drawingl igure l is a vertical central sectional newof a pumpfembodymg my unprove- Specification of Letters Patent.

Patented Jan. 14, 1919.

Serial No. 227,282.

merits. the compression end of one of the cylinders and the connectingend of its manifold being shown in side elevation.

Fig. is an end elevation of my improved pump. partly in verticalsection.

My improved pump is of the multiple cylinder type and as here showncomprises two cylinders 1. removably mounted side by sidion a crankshaft case 2. The cylinders l are provided with flanges 3 through whichscrew-bolts 4 pass into the crank shaft case 2. as shown. thusremo'vably connecting the cylinders and the crank shaft case.

The type of pump here shown takes air through a suitable air-passage 5into the crank shaft chamber (3, and this air passes into the open lowerends of the cylinders 1 and through an outlet opening 7, in each pistonThe opening 7 is provided with a valve 9. the stem of which is guidedand supported by a suitable valve guide 10, mounted in the head of thepiston 8. 1 cone-shaped spiral spring 11 has its large end abuttingagainst the guide 10,and its lower end held by a scrmv-nut 12 on the endof the valve stem 13. The compressed air from the compression chamber 14passes through a valved opening 15. formed in the head of the cylinder.and this opening is controlled by a valve ll). The stem 17 of this valveis supported and guided by a suitable guide ring 18. and a conicalspiral spring 13) has its large end abutting against this guide 18 andits small end engaging the head of the valve Ll).

A suitable crank shaft 20 has its ends 21 journaled in cml bearings 22.the ends 23 of the crank case.

Pistons 7 are connected with the crankshaft by the connecting rods 24.which are provided with suitable bearings 25, While the opposite ends ofthe. connecting rods are connected with the pistons by means of theusual wrist-pin 2(3. Ashore shown the wristpin Zliis locked in positionin the piston by a'suitable screw 27.

As shown, the compression ends of the cylinders are connected by amanifold 28.

"My improved manner of connecting the manifold consists in providing abrass wedge-shaped packing 30, which is placed between the inner side ofthe screw threaded flange 31 of the cylinder .head, and the end 32 ofthe manifold. This wedge-shared packing is forced to tight position bysupported in provide an absoidieiy air-eight comieeeioil' between themanifold and the cylinder head Attention is directed to the construct onof iiie cylinder head 35, in that it is provided with a, chamber36'iooated outside ofond surrounding the valve 16. This coir siriictionpermits a free unimpeded pessegc of air from the compression chamber 14:around and beyond the valve 16 on its way who the manifold. 7

It will be observed that the'cyiindei'e are "grovided with vciiicoliyarranged cooling ns 37, which are found to be more efficient thantransversely arranged cooling fins, in that the air has s free upwardpassage past the fins, which is not the case when they are arrangedimnsveise the cylinders and the cyiinders supported in e verticalposition. I find this arrangement of the cooling fins to be veryeificient. However, this forms no part of my present invention and. whendesirable the cylinders may be Wider cooled bye, suitobieweli knownwoterqeoiiet (not shown}.

A. suitable hood 38 is located outside of the air-passage 5, and extendsdown a, considerable distance, as shown in Fig; m and the air before itreaches the crank cese chamber 6 passes under the lower end of thishood. or apron 38 and up'wzii'dbetween it mod the end of flie'crunk caseto the air 5" By this arrangement spisisoi'ng' mud and dirt is preventedfiom entering the pump Wicii iiio air that is passing therethrodgii.

Turning now to my iii'ip'foved oiiiog, systom, which is the 'zrimei'yimpioveiiieni here disclosed, I provide onioii siippiy chamber or sump40, which is below the Ciffiltii shaft chamber 6. Oil is supplied to eember 20, through d suitobie oil fiiier 4:1, which hes its openingprovided with e desbeciieiile plug- 42.

For the urpose of iubricoizing she pistons and. cyiiners, I provide 2ifeii oii pad 48, which is located between the adjacent lower ends of thecylinders. This feiii pad is ermaily held upward by a. suiiioble fiatspring 44, and an oil suppiy Wick i5 extends fi'oin the pad 18 down intothe oii chember i0, as show n in Fig. 2. Oi! is suppiied by capillaryaction from the chamber ii), through the sup plywiok &5 to the pad 4-3,and this Wick ex" tends down both. sides of the creek case throughchannels 46 to the chamber 40, The

- felt spring, 4% holds the pod 4:3 up so that. it

is touched by the lower and of the pisfixon each time it moves down andis slightly depressed ehercby. In iiiis Way the piston takes upsufiicicntoii to furnish lubrication Bound Book oiliess Eteei'iiigseem-oi ifiiie some iime preveiiis any excess iiiioi'ioo eion reachingthe compression choi'z oer i i and being carried eiiei'eirom with thecompressed aminto one idlfi be .iliiiaifliiv- The main bearings 21 areiiioricoized o" brioating Wicks 47, which pass through c ncis &8 intoihe'oimmber 4rd, and the upper ends or" the Wicks are held in oo-iiociWiitii iii e main openings by suiiiebie rings 49*, 2 which are locatedbetween she ewopiire iiieio bearings 22. By this emmieemeet wi i issiweys held, in contact Wiilil die iiio iii 1-,; and eiiicienilubrication of these hearings insured.

The connecting rod bee 's we hired embed by a very siighi; emou oi};Wi'ii forced out of the pad 43 heiow tile 1' when the pump is inoperation. ooiiccts at the bottom 05; the or just about enough 30iobiicsie mo through a felt Wick 5% o W1, nesting rod. Each time co isin its loweefl ,osiiioze, ohii iitiieoii Whio is convey wifih which ii:is in oonfzeci The cylinders, as is singly, but they may Le c 21150, ashere shown, the cyii made sepaiieee from the screwed therein though it"that on cylinder heads be made port. I

As here shown, the pump is c we cyiinde s, imi; I desire so stood. timemy improvemenes ere idem be used with o iairgei number of cy iii, andeven with E, singie cylinder v The bearings used. iii. this pump Withoutdamage. ,.,4

Viith on oiiing system, iiifiift: show: oidy neoessei-y to poem oiitiiio 41 into the pump, eii bee, 6 m with the piston and cyiiiiders willbe oie'nely lubricated, amid the Wiii d iiii free from. any emce of oiii 01 inf tires.

A self lubricating hearing 51 at she upper end of oheoonnecting rod 2 4-ii is also provided a sins-1i opening in if of the said bearing throughwhich .22 oil 12* may pass to "the bearing, shonid on coileci/ in theunder side of the pision or on c ne and of the valve stem As this pumpis particularly imbeiioied for use under the cai- Where it is subject53o mod, dust, Water and all kinds of almee oi? ibis no time, 3 suitabledose protecting foil 53 em:- rounds the exposed end of the crook s} and,the hood 38 protects the air: iiiiet o ing 5 in'der, and 21v Wickextending from the Crank shaft intethe eil Well, the aris combined forthe purpose described.

10. in an air pump, the combination of e crank case, a cylindermagnified hereon z, lubrieaeing pad at the lower end of the cyliim der,a crank shaft jouinaled in the crank ease, the crank case having an oilchamber below the emnk shaft, and a wick channel extending to theiubriceing pad, a Wick passing threugh the channel :Emm *ahe pad intothe oil chzunber, and a Wick extending from the crank shaft into he OiiChZLXfibGI, whereby the piston and crank shaft are supplied withlubrication from the oil supply chamber.

11. In an air pmnp, the combinatimi e1? wank case, a eyiifler mmmtedfliz-az'c-rei"i & piston. Within the e3 Hider, crank ska-gift opemtivelycenneeted Wifl) the pisten, an oil receiving member a5 the lower end 9:?H19, cylinder, an eii supply Wei} on crank ease, e wick ehenneiemencling mam the oil Well 0 the nil receiving mamer' and e Wick passingtiireugh the ehamiel and connecting the oil Well ifih the 0%) receivingmen'ibei fer the purpose deseribedi.

in testimeny Whereei LE heweume affix my sigi'mtm'e in the presence twowitnesses.

iEURGE EEB G-AR HAZARD Wiinessee J. W, DOYLE, RALPH Q. l'iim'NEe

